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Synthesis 1987; 1987(7): 616-618
DOI: 10.1055/s-1987-28023
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Facile One-Pot Synthesis of 2,1,3-Benzoxadiazole N-Oxide (Benzofuroxan) Derivatives Under Phase-Transfer Catalysis

N. R. Ayyangar* , S. Madan Kumar, K. V. Srinivasan
  • *National Chemical Laboratory, Pune 411008, India
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Publication Date:
20 August 2002 (online)

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Several 2,1,3-benzoxadiazole N-oxide (benzofuroxan) derivatives are synthesized from the corresponding o-chloronitrobenzenes in a one-pot operation by stirring with sodium azide in dichloroethane in the presence of benzyl tributylammonium bromide as a phase-transfer catalyst. The moderate reaction conditions enable the isolation of the intermediate reactive azido compounds.